About BADASS Supra

Hello guys,
i would like to understand the calculation of the injection time.. In my opinion, it should be relatively simple to understand.
If i have a warm engine (no cold start enrichment etc), and constant difference between fuel pressure and intake manifold pressure, the Injection_Effectiv_PW should be calculate so:
Injection_Effectiv_PW_calc=constant_conversion_factor x Master_Fuel x Fuel_Table1 x (1+Lambda__Fuel__Corr/100) x (1+Accel_Fuel/100) x (14.7/AFR_Target) x (1+IAT_Fuel_Corr/100)
If i plot Injection_Effectiv_PW (measure) over Injection_Effectiv_PW_calc, i haven't a straight line. I don't understand, what i do wrong? Is there another corrections for the injectors?
Thanks for help.
Best regards
Andre